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DAC161S997RGHR Scheda tecnica(PDF) 9 Page - Texas Instruments |
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DAC161S997RGHR Scheda tecnica(HTML) 9 Page - Texas Instruments |
9 / 27 page DAC161S997 www.ti.com SNAS621 – JUNE 2013 REGISTER SET Unless otherwise indicated, bits outside the register fields listed below are do not care, and will not change device configuration. Register read operations on such do not care fields will be 0. Registers are read/write unless indicated otherwise. Table 1. XFER_REG (Write Only) Address = 0x01 Bit Field Field Name Description When PROTECT_REG_WR is set to 1, then a XFER_REG command is necessary to 15:0 XFER[15:0] transfer the previous register write data into the appropriate address. Set this register to 0x00FF to perform a XFER_REG command. Table 2. NOP Address = 0x02 Bit Field Field Name Description No Operation. A write to this register will not change any device configuration. 15:0 NOP[15:0] This command indicates that the SPI connection is functioning and is used to avoid SPI_INACTIVE errors. Table 3. WR_MODE Address = 0x03; Default = 0x0000 Bit Field Field Name Description 0: Register write data transfers to appropriate address immediately after CSB goes high. Default value. 0 PROTECT_REG_WR 1: Enable protected register transfers: all register writes require a subsequent XFER_REG command to finalize the loading of register data. Refer to OPTIONAL PROTECTED SPI WRITES Table 4. DACCODE Address = 0x04; Default = 0x2400, 0xE800 Bit Field Field Name Description 16-bit natural binary word, where D15 is the MSB, which indicates the desired DAC output code. 15:0 DACCODE[15:0] Note the default value of this register is based on the state of the ERR_LVL pin during startup or reset. Table 5. ERR_CONFIG Address = 0x05; Default = 0x0102 Bit Field Field Name Description L_RETRY_TIME sets the time interval between successive attempts to reassert the desired DACCODE output current when a loop error is present. This has no effect if either MASK_LOOP_ERR is set to 1 or if DIS_RETRY_LOOP is set to 1. 10:8 L_RETRY_TIME[2:0] LOOP Retry time = (L_RETRY_TIME + 1) × 50 ms Default value = 1 (100 ms) 0: When a loop error is occurring, periodically attempt to send desired DACCODE output current instead of the set ERR_LOW current. The interval between attempts is set by L_RETRY_TIMER. Default value. 7 DIS_RETRY_LOOP 1: Do not periodically reassert DACCODE output when a loop error is present; reassert DACCODE after STATUS Register is read out. 0: When a LOOP error is detected the DAC161S997 outputs the current indicated by ERR_LOW instead of DACCCODE. Default value. 6 MASK_LOOP_ERR 1: When a Loop Error is detected the DAC161S997 tries to maintain DACCODE current on pin OUT. Copyright © 2013, Texas Instruments Incorporated 9 Product Folder Links: DAC161S997 |
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